Turning device for diamond tool



May 13, 1958 Filed March 28, 1955 IN V EN TOR. Joe 1 06C), Jk.

A7- romvE Y5 wed Se s M r 2,834,333 TURNING DEVICE FOR DIAMOND TOOL JoeLoecy, Jr., Chardon, Ohio Application March 28, 1955, Serial No. 497,2272 Claims. Cl. 125-39 This invention relates to the art of diamondturners for use in the dressing of grinding wheels and the like.

As is well-known, it was the practice for the operator to intermittentlyturn the diamond tool in either direction by hand so as to present freshportions of the diamond surface to theiwork and thus prevent'uneven wearupon the same, the purpose of course being to prolong the life ofusefulness of the diamond. Then I developed and have been producingdevices with automatically operated means for turning the diamond nib asit is withdrawn from the work in its.back and forth travel; that is, thediamond nib is turned in only one direction so as to always ensure thepresentation of a fresh surface portion thereof to the work. But I findthat certain conditions and circumstances forbid the use of suchautomatic devices in some instances and I realize too that hisdesirable, in the turning of the diamond tool by hand, to provide meansfor effecting such turning in only one direction so as to prevent thepresentation of the same surface portion of the diamond to the work atall times.

Accordingly, the object of my present invention is to devise a diamondturner that may be manipulated by hand and yet may be effective inturning the diamond in only one direction.

A further object is to devise a hand-manipulated.

diamond turner that is of simple construction and hence comparativelyinexpensive and that can be manufactured and sold at a reasonable price.

A still further object is to devise a diamond turner of this type thatis of a unitary assembly and can be marketed and handled in a convenientmanner and can be very readily installed in a machine for use.

Another object consists in the provision of the particular form ofstructure, as herein disclosed, that makes possible the presentimprovement as herein noted.

Other objects will appear from the following description and claims whenconsidered together with the accompanying drawing.

Fig. l is a view, partly in elevation and partly in section,illustrating my present form of device, this view corresponding to line1--1 of Fig. 2;

Fig. 2 is a view corresponding to line 2-2 of Fig. 1.

It is to be understood that the present form of disclosure is merely forthe purpose of illustration and that there might be devised variousmodifications thereof without departing from the spirit of my presentinvention as herein set forth and claimed.

Referring now to the accompanying drawing, the cylindrical housing 1 maybe mounted by means of the shank portion 1a upon the machine thatis-indicated in only a general way by reference letter M. Within thehousing 1 there is rotatably adjustably and coaxially mounted thetransfer ring 2 which surrounds the tool holder for rotatable adjustmentthereof about the longitudinal axis of the device. This tool holdercomprises the holding body part 3 and the nib 4 with the diamond point5, the nib 4 being held by set screw within the body part 3, The bodypart 3 has its inner end provided with an 2,834,333 Patented May 13, 1958 ice ' annular flange portion 3a that is arranged between the base ofthe housing 1 and the outer annular bearing member 6 which may have itsinner portion held by frictional engagement within the housing 1. Thespring disk 7 has engagement between the central part of the base of thehousing 1 and an annular shoulder provided at the inner end of the toolholder so as to maintain the same in the desired position to which setin the manner to be described below; and I have provided the washer 8between the outer side of the flange portion 3a of the tool holder andthe opposite inner face of the bearing member 6. The bearing member 6may have a lubricating opening therethrough to the tool holder and thisopening has the removable screw-threaded grease-fitting 9. a

Around the outside of the housing 1 the cover ring 10 is mounted forrotatable adjustment thereabout. The outer edges of the cover ring 10have annular shoulder portions for engagement with the annular cornersof the housing 1 and the bearing member 6. The radially extending handle11 has removable screw-threaded engagement in the enlarged portion ofthe cover ring 10 and has its inner end formed as a plain projection 12that extends through the arcuate aperture 13 in the wall of the housing1 so as to have engagement in the recess 14 in the transfer ring 2. Withthis arrangement, turning of the handle 11 and the cover ring 19 willcause corresponding turning movement of the transfer ring 2 while thehousing 1 remains stationary, such turning movement of the cover ring 10being permitted back and forth to the extent of the arcuate aperture 13.

Between the annular flange portion 3a of the tool holder and thetransfer ring 2 I have provided one-way clutch means so that only theturning of the transfer ring 2 in one direction will effect turning ofthe holder 3 and its nib 4. This clutch means comprises a plurality ofrollers 15, each of which is positioned in a recess 16 in the outersurface of the flange 3a of the tool holder and each of which has a coilspring 17 seated in a recess in the wall of the recess 16, this springin each instance tending to normally force its roller 15 outwardlytowards frictional wedging engagement between the inner surface of thetransfer ring 2 and the opposite side of the recess 16. Upon turning ofthe transfer ring 2 in one direction, counter-clockwise as viewed inFig. 2 of the present drawing, there will be effected binding or wedgingengagement of the rollers 15 between the tool holder and the transferring so that the tool holder will be turned then and then only with thetransfer ring 2 as a unitand consequently there will be a turning of thediamond. But, upon turning of the transfer ring 2 in the otherdirection, clockwise as viewed in Fig. 2 hereof, it will slip over therollers 15, as permitted by the springs 16, and there will be no tumingof the tool holder. As a result, there will be a turning of the toolholder in only one direction and consequently there will be presenteddifferent surface portions of the diamond to the work and the life ofusefulness of the diamond will be prolonged.

It is believed that the practical advantages of my present form ofdevice will be apparent to those who are familiar with the art to whichthis invention relates.

What I claim isi 1. In a device of the class described, the combinationof an interiorly cylindrical housing having a central base portion, anoscillatable annular transfer ring co-axially arranged within saidhousing with respect to the longitudinal axis thereof, a tool holderrotatably and co-axially mounted within said ring and having a recess atthe rear end thereof, means of one-way clutch connection between saidtransfer ring and said tool holder for effecting oneway rotary movementof said toolholder, a spring disk having frictional engagement betweensaid central base portion of said housing and the recessed rear end ofsaid tool holder for holding said tool holder in position to whichadjusted, a cover ring surrounding and oscillatable about said housing,a removable handle extending radially outwardly from said cover ring formanipulation thereof and having an inward projection therethrough, thewall of said housing having an arcuate aperture through which saidprojection extends, and said transfer ring having a recess to receivethe inner end of said projection for operative engagement therewith formanipulation of said one-way clutch means.

2. In a device of the class described, the combination of an interiorlycylindrical housing having a central base portion, an oscillatableannular transfer ring co-axially arranged Within said housing withrespect to the longitudinal axis thereof, a tool holder rotatably andco-axially mounted within said ring, means of one-way clutch con- I 4nection between said transfer ring and said tool holder for effectingone-way rotary movement of said tool holder, a spring disk co-axiallydisposed with respect to the longitudinal axis and having frictionalengagement between said central base portion of said housing and therear end of said tool holder for holding said tool holder in position towhich adjusted, and means for rotary manipulation of said transfer ringfor operation of said clutch means.

References Citedin the file of this patent UNITED STATES PATENTS ILundin June 27, 1933 1,915,542 2,628,608 Loecy Feb. 17, 1953 2,644,442Loecy July 7, 1953 2,73 8,784 Karpovitz Mar. 20, 1956 2,752,909

Curran July 3, 1956

